Exam Practice Questions And Correct

Ohio Confined Space Rescue Technician Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• What is the primary purpose of a confined space entry permit?
• To authorize entry into a confined space without supervision
• To document safety measures and hazards before entry
• To record working hours of personnel
• To satisfy OSHA paperwork requirements
• To document safety measures and hazards before entry

Rationale: The permit ensures all hazards are identified, controls are

in place, and personnel are aware of safety procedures before entering the confined space.

• Which of the following is considered a confined space?
• A walk-in refrigerator 1 / 4

• A storage shed with open doors
• A warehouse
• A loading dock
• A walk-in refrigerator

Rationale: Confined spaces are defined by limited entry/exit points,

not designed for continuous occupancy, and may have hazardous atmospheres. Walk-in refrigerators meet this definition.

• What is a permit-required confined space (PRCS)?
• Any space with restricted entry
• A space that contains or may contain a hazardous atmosphere
• Any storage area
• An office with poor ventilation
• A space that contains or may contain a hazardous atmosphere

Rationale: A PRCS is identified because it presents hazards such as

toxic gases, oxygen deficiency, or engulfment risks, requiring permits and special procedures.

• Which gas detector measurement is critical before entering a confined

space?

• Carbon monoxide
• Oxygen levels
• Hydrogen sulfide
• All of the above
• All of the above 2 / 4

Rationale: Confined spaces may contain multiple hazards; oxygen

levels, toxic gases, and flammable gases must all be measured before entry.

• What is the minimum safe oxygen concentration for human entry?

A. 15%

B. 19.5%

C. 21%

D. 23.5%

B. 19.5%

Rationale: OSHA defines 19.5% to 23.5% oxygen as the acceptable

range for safe breathing. Below 19.5% can cause hypoxia.

• Which type of rescue is considered highest risk in confined space

operations?

• Non-entry rescue
• Entry rescue
• Rope-assisted rescue
• Standby observation
• Entry rescue

Rationale: Entry rescue involves rescuers entering the confined space,

exposing them to the same hazards as the victim, making it the most dangerous.

• What personal protective equipment (PPE) is mandatory for confined

space rescue? 3 / 4

• Gloves and hard hat only
• Full body harness and respiratory protection
• Safety glasses and steel-toe shoes only
• Ear plugs and apron
• Full body harness and respiratory protection

Rationale: A harness allows safe retrieval of personnel, while

respiratory protection safeguards against hazardous atmospheres.

• Which OSHA standard governs confined space entry and rescue?

A. 29 CFR 1910.146

B. 29 CFR 1926.651

C. NFPA 1006

D. ANSI Z117.1

A. 29 CFR 1910.146

Rationale: OSHA’s 1910.146 specifically addresses permit-required

confined spaces, including entry, hazards, and rescue procedures.

• Which type of ventilation is preferred in a confined space?
• Natural ventilation
• Mechanical forced air ventilation
• Open door ventilation
• No ventilation
• Mechanical forced air ventilation

Rationale: Mechanical ventilation actively removes hazardous gases

and ensures fresh air, providing safer conditions for entry.

• / 4